$ git clone -n https://src.fedoraproject.org/rpms/rust-unarray.git /var/lib/mock/f38-build-side-43-rust-devel-1418424-31459/root/chroot_tmpdir/scmroot/rust-unarray
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1418424-31459/root/chroot_tmpdir/scmroot/rust-unarray'...
$ git fetch origin 9705f31fe850dec82b3ddbc603ed184e470ada33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unarray
 * [new ref]         9705f31fe850dec82b3ddbc603ed184e470ada33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9705f31 Initial import (#2167384)